[SPARK-20665][SQL][FOLLOW-UP] Move test case to MathExpressionsSuite

## What changes were proposed in this pull request?

 add test case to MathExpressionsSuite as #17906

## How was this patch tested?

unit test cases

Author: liuxian <liu.xian3@zte.com.cn>

Closes #18082 from 10110346/wip-lx-0524.